Pneumatig-tire plug



No. 609,901. Patented Aug. 30, I898. 0. F. DNEILL.

PNEUMATIC TIRE PLUG.

(Application filed Feb. 26, 1898.)

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NlTED STATES PATENT Prion.

OlVEN F. ONEILL, OF PHILADELPHIA, PENNSYLVANIA.

PN EU MATlG-TIRE PLUG.

SPECIFICATION forming part of Letters Patent No. 609,901, dated August30, 1898. Application filed February 26,1898. Serial No. 671,856. (Nomodel.)

To all whom, it may concern.-

Be it known that I, OWEN F. ONEILL, a citizen of the United States ofAmerica, and a resident of the city and county of Philadelphia,Pennsylvania, have invented certain new and useful Improvements inPneumatic- Tire Plugs, of which the following is a specification.

My invention has reference to plugs for pneumatic wheel-tires and itconsists of features fully set forth in the following specification andaccompanying drawings, forming part thereof.

The object of my invention is to provide a plug for tires of the classdescribed that will thoroughly and eifectually repair any puncture theymay by accident receive, and particularly punctures of large size.

It consists of a pneumatic plug formed from two parts, the one having athin flexible rubber diaphragm or disk on which is integrally carried alaterally-projecting stem or plug. Fixed to this diaphragm byvulcanization or any eifectual means is a second disk, heavier and morerigid in its structure. These two disks are only united in the mannerdescribed toward their respective circumferences, to be moreparticularly described hereinafter.

In the drawings like parts are referred to by marks of a correspondingkind in the different views.

Figure 1 is a vertical longitudinal section through a tire having apuncture therein repaired by my plug, being a section on line 0 c ofFig. 8. Fig. 2 is a vertical section through the plug-stem and itsintegral diaphragm, being a section on line h h of Fig. 5. Fig. 3 is aplan of my heavy disk. Fig. 4 is a bottom plan of my two disks united.Fig. 5 is a plan of my disk carrying the plug. Fig. 6 is a section online 'i 2' of Fig. 3. Fig. 7 is a side elevation of my two disks united.Fig. 8 is a top plan of a wheel-tire, showing the puncture with my plugin position and indicating by dotted lines the position relatively tothe disks. Fig. 9 is a transverse section through a tire, being asection through the line J of Fig. 8.

A is the tire. E represents a punctured hole therein, Figs. 1, 8, and 9.

B is a round stem carrying a thin flexible diaphragm or disk 0. Thisdisk and stem are edge.

preferably of rubber of pure quality, whereby the disk is renderedexceedingly flexible and can thus adapt itself to a broken and raggedThese parts can be made of many different sizes, and the comparativesize shown in the drawings would be an extremely large size. D is also adisk made, preferably, of rubber, but of more body in cross-section, asshown in Fig. 6.

e e are a series of holes carried by the disk D. These holes areair-inlet passages and their function will be presently explained.

The disks D and O are firmly united'at their circumferences byvulcanization or any effectual means. The dotted lines M in Figs. 1 and3 indicate the inner circumference of the line of the vulcanization ofthe two said disks, making them or their contact-surfaces from M to theouter circumference substantially one solid integral mass. The innereenterward faces M of the disks 0 and D are disconnected, as shown inFig. 1 and indicated in Fig. 3.

C, Fig. 1 only, indicates a layer of cement intervening between thediskO and the inner face of the tire at the point of mend. This ce mentwill of course extend partly up through the rupture. (Shown in Figs. 1,9, and 8.)

Now it is a well-known fact that plugs for bicycle or other pneumatictires where a stem is used having integral therewith a thick and rigiddisk will not make an effectual and airtight repair. This is because ofthe necessity of having this disk of strong and unyielding character, orrather that the necessity for strength makes such a demand for heavybody that it becomes thereby unyielding and will not adapt itself,therefore, to the irregularities of a broken edge or ragged sectionoccasioned by the puncture. By reason of this inadaptation on the partof these former heavy disks if the cement failed (as it nearly alwaysdoes) to thoroughly close all the minute airoutlets between the innerportion of the tire and the rupture the said rupture would leak. This isthe defect which my invention overcomes. The disk 0 is thin, strong, butvery flexible. This disk is cemented to the inner surface of thepneumatic tire. The disk D is more rigid and much heavier in body. Theholes e 6 permit the air to pass therethrough and press upon theflexible disk 0, whereby and thereby this disk will adapt itself toinequalities of the edges of a puncture, and the pressure thus exertedwill prevent the egress of the compressed air within the tire. The disk0 therefore is the disk which, coacting with the cement, seals securelythe rupture absolutely against leakage, and the disk D backs,strengthens, and reinforces disk 0. In Fig. 1 I show the disksaforementioned as slightly separated and indicate the passage betweenthem by f. This is to make clear the vulcanized union of the disks andthe part that is not so united.

M, Fig. 1, indicates that portion of the plug which is removed aftersame is set.

I do not confine myself to the specific structure set out, but couldmake modifications without departing from the spirit of my invention.

Having now described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is

1. A plug for a pneumatic tire consisting of a plug, a thin flexibledisk integral therewith, a secondary disk of heavier body, said latterdisk having air-inlet holes and the two said disks being united byvulcanization or other means near their respective circumferences.

2. A plug for a pneumatic tire consisting of a stem or plug, a thinflexible integral plate carried thereby, a secondary plate heavier inbody than said former plate, said latter plate having holes permittingair to pass therethrough, said two plates being united near theircircumferences, whereby the said latter heavy plate'reli'eves the formerlighter one from undue tension thus strengthening the plug as a unit,and whereby the said lighter plug pneumatically assists in sealing thepuncture.

Signed by me, at Philadelphia, this 4th day of February, 1898.

' OWEK F. ONEILL. Witnesses:

HOMER A. HERB, JOSHUA R. MORGAN.

